1
JEE Main 2019 (Online) 9th April Evening Slot
+4
-1
The parallel combination of two air filled parallel plate capacitors of capacitance C and nC is connected to a battery of voltage, V. When the capacitors are fully charged, the battery is removed and after that a dielectric material of dielectric constant K is placed between the two plates of the first capacitor. The new potential difference of the combined system is :-
A
V
B
$${V \over {K + n}}$$
C
$${{(n+1)V} \over {K + n}}$$
D
$${{nV} \over {K + n}}$$
2
JEE Main 2019 (Online) 9th April Morning Slot
+4
-1
Determine the charge on the capacitor in the following circuit :
A
200μC
B
2μC
C
10μC
D
60μC
3
JEE Main 2019 (Online) 9th April Morning Slot
+4
-1
A capacitor with capacitance 5μF is charged to 5μC. If the plates are pulled apart to reduce the capacitance to 2μF, how much work is done ?
A
2.16 × 10–6 J
B
2.55 × 10–6 J
C
3.75 × 10–6 J
D
6.25 × 10–6 J
4
JEE Main 2019 (Online) 8th April Evening Slot
+4
-1
A parallel plate capacitor has 1μF capacitance. One of its two plates is given +2μC charge and the other plate, +4μC charge. The potential difference developed across the capacitor is:-
A
1V
B
5V
C
2V
D
3V
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